text: I would do it with aligned, in this way:
  
  \documentclass[]{article}
   \usepackage{amsmath,mathtools, nccmath}
  
  \begin{document}
  
  \begin{align}
  \label{one}
   &amp; \begin{aligned}x^{(2)} = &amp; \mfrac{1}{10} ( \varphi(100x_1+175) +\varphi(-100x_1+150) + \cdots {}\\
  &amp; + \varphi(100x_1-125) +\varphi(-100x_1-150) ) -\smash{\mfrac{1}{10}}
  \end{aligned}
  \\[1ex]
    &amp; \begin{aligned}
  \phantom{x^{(2)} = }&amp; + \mfrac{1}{10}\varphi_{\tanh}( 100x_2+150) +\mfrac{1}{10}\varphi_{\tanh}(-100x_2+150)\\
  &amp; + \varphi_{\tanh}(x_5)
  \end{aligned}
  \label{two}
  \end{align}
  
  \end{document}